if (self.screen) { 
width = screen.width
height = screen.height
}
else if (self.java) { 
var jkit = java.awt.Toolkit.getDefaultToolkit();
var scrsize = jkit.getScreenSize(); 
width = scrsize.width; 
height = scrsize.height; 
}else{
width = height = 'x' 
}
var url800x600 = "indexrus800.php";
var url1024x768 = "indexrus.php";
if ((screen.width == 800) && (screen.height == 600))
window.location.href= url800x600;